Tdr Cable Test

[prince.p]

Hi freiend,

i need to test the cable status from cisco 2960 switch to connected device,in the pair c and d it shows shot. i need your suggestion weather i need to change the cable are not . below i attached the report

tri-SW2#show cable-diagnostics tdr i

tri-SW2#show cable-diagnostics tdr interface gi0/13
TDR test last run on: May 20 22:40:02

Interface Speed Local pair Pair length Remote pair Pair st
--------- ----- ---------- ------------------ ----------- -------
Gi0/13 100M Pair A 17 +/- 0 meters N/A Normal
Pair B 17 +/- 0 meters N/A Normal
Pair C 18 +/- 1 meters N/A Short
Pair D 17 +/- 1 meters N/A Short

[Mark Malone]

Yes change the cable , have a read of this explains TDR very well

https://supportforums.cisco.com/t5/network-infrastructure-documents/how-to-use-time-domain-reflectometer-tdr/ta-p/3119327

[prince.p]

thanks for your post.
what cable i want to change.whether the remote end cable ie IO box to
device or Cable from patch panel to switch or the horizontal cable ie from
Patch panel to IO box

[prince.p]

thanks for your post.
what cable i want to change.whether the remote end cable ie IO box to
device or Cable from patch panel to switch or the horizontal cable ie from
Patch panel to IO box

[Mark Malone]

start by changing the one you just tested g0/13 and then rests see if you still have an issue with it

[Leo Laohoo · Accepted solution]

Depends on the downstream device. The results from the TDR tells me, possibly, the remote end device is only a 10/100 BaseTx and doesn't require PoE.

If this is the case, then there is no need to do any replacement.

[prince.p]

thank all lot. my doubt is cleared.